You're a bit of a flibbertigibbet, and apt to get bored with things.Irene Rathbone, We That Were Young, 1932

She did a lot for nursery schools. She was friendly with a lot of serious people, and if she had been just a cantankerous flibbertigibbet, she wouldn't have had those friends.Deirdre Carmody, "The Astors Battle a TV Image," New York Times, June 13, 1982

Origin of flibbertigibbet

late Middle English

1425-1475

Flibbertigibbet is of obscure origin, but is thought have been formed as an imitative representation of the sound of chatter or gossip. It entered English in the late 1400s.